From the Integrating Mathematical Problem Solving project by Mathematics in Education and Industry (MEI), this activity for post-16 students shows that correlation can be used to measure the strength of a linear relationship.

Statistical Inference looks for evidence of what is happening in the population by...

In order to avoid predators, the caterpillars of some species of moths rest during the day by masquerading as twigs, well-camouflaged and keeping their bodies rigid and still. The aim of the investigation is to determine if caterpillars of the peppered moth show a preferred angle of rest.